const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : '0' + n
}

const getStrLength = (str) => {
  var realLength = 0, len = str.length, charCode = -1;
  for (var i = 0; i < len; i++) {
      charCode = str.charCodeAt(i);
      if (charCode >= 0 && charCode <= 128)
          realLength += 1;
      else
          realLength += 2;
  }
  return realLength; 
}
module.exports = {
  formatTime: formatTime,
  getStrLength: getStrLength
}
